How to Save Money on Audi Battery Replacement Are you experiencing issues with your Audi key fob having trouble locking and unlocking? This could be a sign that the battery is in need of replacement. To replace the battery, open the metal key using flathead, then pop the back cover https://g28carkeys59787.wizzardsblog.com/29861745/this-is-the-good-and-bad-about-audi-a4-spare-key